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zorro
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Homework Statement
Two bulbs which consume powers P1 and P2 are connected in series. What is the power consumed by the combination?
The Attempt at a Solution
Assuming that the same voltage is applied across the bulbs when connected separately,
R1 = V2/P1
R2 = V2/P2
When connected in series, total resistance of the circuit is V2(1/P1 + 1/P2).
So power consumed = V2/Rs = P1P2/(P1+P2)
But this is not the correct answer